CC2650 EM - issues with SPI

Syama Sasikumar

Other Parts Discussed in Thread: CC2650, CC2650STK

HI,

I am using CC2650 EM + SmartRF06. My code is in contiki and my development platform is linux/gcc. I am facing issues while trying to configure SPI bus. In the contiki set of codes checked out from the git repository, there were some SPI apis defined for CC2650 sensortag. I used the same for my CC2650 EM with changes in pin mapping according to my hardware. All SPI initialization and configuration steps given in CC2650 user guide are performed in those apis. But, I am not even able to obtain the SPI clock pulse.

Is there any sample SPI code for CC2650?

Are there any addittional SPI initialization steps that should be followed ?

Thanks in advance.

over 9 years ago

YiKai Chen over 9 years ago

Guru 735685 points

I know there is SPI driver implemented in CC2650STK, you can try to refer to board-spi.c and board-spi.h in \contiki\platform\srf06-cc26xx\sensortag and use it on srf06+cc2650em.

Syama Sasikumar over 9 years ago in reply to YiKai Chen

Expert 1010 points

I am using the same. But still it is not working.

YiKai Chen over 9 years ago in reply to Syama Sasikumar

Guru 735685 points

Do you use oscilloscope to check if there is any signals on SCLK pin?

Syama Sasikumar over 9 years ago in reply to YiKai Chen

Expert 1010 points

Yes. I did. There is no signal on SCLK pin.

YiKai Chen over 9 years ago in reply to Syama Sasikumar

Guru 735685 points

Which pin do you use as SCLK?

Syama Sasikumar over 9 years ago in reply to YiKai Chen

Expert 1010 points

I used DIO_8 (pin 21) .

YiKai Chen over 9 years ago in reply to Syama Sasikumar

Guru 735685 points

The default SCLK pins in Borad.h for srf06-CC26xx is IOID_10. Do you change it?

/*---------------------------------------------------------------------------*/
/**
* \name SPI IOID mapping
*
* Those values are not meant to be modified by the user
* @{
*/
#define BOARD_IOID_SPI_SCK IOID_10
#define BOARD_IOID_SPI_MOSI IOID_9
#define BOARD_IOID_SPI_MISO IOID_8

Syama Sasikumar over 9 years ago in reply to YiKai Chen

Expert 1010 points

Yes. I changed it according to my harware configuration.

Syama Sasikumar over 9 years ago in reply to YiKai Chen

Expert 1010 points

In the spi_open api, clock pin number is passed as an argument. Therefore, I explicitly passed my clock pin number as the argument to the function. I did not use the BOARD_IOID_SPI_SCK macro.

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CC2650 EM - issues with SPI